I want to adjust the timing on my engine (1980 150 hp v6). I have good compression across the cylinders (120 thru 130 across the board). I have replaced/rebuilt the entire fuel system and cooling system. The engine still runs like chit. I am going to test the electrical system later this week following my manual. My flywheel doesn't have a cover over it and I was wondering if that was needed to time it using the strobe light???